A:Answer Hi there,
We are finding that this model is not ductless. However, you can make the unit recirculating rather than externally vented if you would prefer. Take a look at pg. 8 of this unit's installation instructions, you should see steps on how to make the unit recirculating. You can view that document here: https://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=31-10983-7.PDF - We hope that this helped! Thank you so much for your question. -Michael